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Revenue from Contracts with Customers - Details of Revenue from Contracts with Customers based on Service Contract and Timing of Satisfaction of Performance Obligations (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | ₩ 500,845 | ₩ 725,516 | ₩ 463,618
At a point in time |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 111 | 119 | 25
Over time |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 500,734 | 725,397 | 463,593
Micro-transaction revenue |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 409,951 | 639,231 | 341,769
Micro-transaction revenue | Online game |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 61,425 | 70,566 | 80,147
Micro-transaction revenue | Mobile game |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 348,526 | 568,665 | 261,622
Royalties and license fees |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 72,714 | 71,390 | 106,259
Royalties and license fees | Online game |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 15,564 | 10,451 | 9,109
Royalties and license fees | Mobile game |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 57,150 | 60,939 | 97,150
Others |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | ₩ 18,180 | ₩ 14,895 | ₩ 15,590

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_114&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_113_a&doctype=Standard -URIDate 2024-03-27 + Details
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